Eaton KOS400 Fuse - Class K5 CE Marked
Part Number: KOS400
Quick Summary
The Eaton KOS400 fuse is a high-current Edison knife-blade fuse designed for main protection in power distribution panels and motor circuits. Engineers often struggle with selecting a device that combines clear ratings, robust protection, and straightforward procurement for critical loads. This unit carries CE marking and CSA Certification context as noted, aligning with global compliance expectations, while its Class K5 architecture supports predictable interrupt performance under fault conditions. With a 400 A rating, 10 kAIC interrupt capacity, and 600 V rating, it delivers reliable protection in demanding industrial environments. For procurement and maintenance teams, the 1-pack standard and non-indicating design help simplify stocking and reduce field servicing time while ensuring consistent protection where space is at a premium.
Product Information
Extended Description
KOS400 Eaton: Eaton Edison KOS fuse, Knife blade, 400 A, Class K5, Non-indicating, 10 kAIC, Standard, 1, 600 V
Product Name
Eaton Edison KOS fuse
Catalog Number
KOS400
UPC
782634374008
Product Length/Depth
11 in
Product Height
2 in
Product Width
2 in
Product Weight
0.001 lb
Warranty
No warranty
Compliances
CE Marked
Certifications
CSA Certified Not Applicable
Amperage Rating
400 A
Interrupt rating
10 kAIC
Voltage rating
600 V
Packaging type
Standard
Class
Class K5
Fuse indicator
Non-indicating
Quantity
1
Special features
Knife blade
Feature: Knife blade design combined with a non-indicating indicator. Business Impact: Simplified replacement and fast field installation without ambiguous status indicators, reducing downtime during fuse changes. Application: Ideal for modular panel assemblies and Edison Bussmann-style holders where quick swaps are routine. Feature: 400 A amperage rating with 10 kAIC interrupt capacity. Business Impact: Strong fault clearance capability minimizes conductor damage and upstream rigging, lowering total cost of ownership. Application: Heavy-load feeders, motor contactors, and 600 V distribution networks benefit from higher fault tolerance. Feature: 600 V voltage rating and 11 in length with compact 2x2 in footprint. Business Impact: Consistent dimensional fitment across standard enclosures, enabling easier retrofits and fewer clearance issues. Application: Control cabinets and switchgear where real estate is constrained. Feature: Class K5 classification and CE compliance. Business Impact: Aligns with industry standards for predictable trip characteristics and regulatory adherence, smoothing audits and procurement validation. Application: Industrial automation panels, safety-critical drives, and compliant power distribution setups. Feature: Standard packaging of one fuse with a documented UPC. Business Impact: Streamlined stocking, accurate inventory tracking, and faster reorder cycles. Application: Purchasing and warehouse teams benefit from simplified SKU management and traceability.
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FAQs
The KOS400 is a 400 A knife-blade Edison fuse designed for compatibility with Eaton Edison Bussmann-style holders and standard 1-pack configurations. It fits typical electrical protection assemblies in power distribution panels and motor control centers, enabling straightforward retrofits and panel upgrades.
Key specs include 400 A amperage rating, 10 kAIC interrupt rating, 600 V voltage rating, and Class K5 classification. It uses a knife-blade design and is non-indicating, with a standard 11 in length and 2 in width/height footprint for compact panel integration.
Yes. The KOS400 carries CE marking and aligns with applicable electrical protection standards. While CSA certification is listed as Not Applicable for this item, CE compliance supports regulatory expectations in many regions, making it appropriate for motor protection and feeder applications in industrial settings.
Since the device is a non-indicating, single-pack fuse, replacement is straightforward with standard stock. Warehouse and field teams benefit from a consistent 1-pack SKU and clear specifications, reducing misidentification during maintenance and ensuring timely protection restoration.
The KOS400 provides reliable overcurrent protection with a high interrupt rating, enabling shorter downtime during faults. Its standardized dimensions, CE compliance, and simple stocking improve procurement efficiency, reduce field service time, and help ensure regulatory and safety requirements are met in upgrade projects.